Safety attachment for gas-burners.



PATENTED SEPT. 19, 1905.

0. FRIEDRICH. SAFETY ATTACHMENT FOR GAS BURNERS.

APPLICATION FILED JUNE 10, 1905.

INVENTOR A TTOR/VEYS UNITED STATES ()SKAR FRIEDRICH, OF HOBOKEN, NEW JERSEY.

PATENT OFFICE.

SAFETY ATTACHMENT FOR GAS-BURNERS.

Patented Sept. 19, 1905.

Application filed June 10,1905. Serial No. 264,706.

To all whom it may concern.-

Be it known that I, OSKAR FRIEDRICH, a citizen of the Empire of Austria-Hungary, residing in Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Safety Attachments for Gas-Burners, of which the following is a specification.

This invention relates to an improved safety attachment for gas-burners which is based upon the expansion and contraction of an expansible rod arranged alongside of the gasburner and acted upon by the flame of the same, so as to control the gas-supply channels leading to the burner and close automatically the gas-supply in case the flame is accidentally extinguished, whereby the escape of gas into the room and the danger arising from the escape of gas is effectually prevented and the improved gas-burner specially adapted for the use of hotels, servants rooms,

, and other applications where a safety device of this kind is desired.

The invention consists of a gas-burner which is provided between thegas-arm and the burner with an intermediate guide-piece and with an expansible rod which is provided with an adjustable arm that extends into the flame, said expansib'le rod being provided with a valve at its lower end communicating with the gas-supply channels of the burner. The expansible rod is supported by an upright rod which is movable in said guide-piece and acted upon by a spring, said supporting-rod being provided with means for adjusting the expansible rod relatively to the supply-channels for producing the proper functioning of the attachment.

The invention consists, further, of certain details of construction, which will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a front elevation of my improvedgas burner.

port an expansible rod C, which is made of metal or other suitable material that is capable of expansion and contraction under the influence of varying temperatures. The expansible rod 0 is guided by means of a stuffing-box H in the guide-piece D and provided at its lower end with a central bore or channel having lateral openings 1), m, and g, which communicate with lateral channels P, m, and Q, which are located in the guidepiece D, as shown in Fig. 3. The channelQ, connects with the interior of the burner-tube. The channels P and Q, are closed by means of screw-studs, which can be removed for cleaning the channels whenever required.

The upper end of the expansible rod C is supported by an asbestos sleeve J with a connecting-piece F, which is supported by an adjustable screw F at the upper end of a supporting-rod E, which is guided in lugs d of the guide-piece D and held by a helical spring Gr,interposed between the lugs in normal position. Stop-pins I on the lower part of the supporting-rod E form contact with the upper lug cl of the guide-piece D and limit the motion of the supporting-rod E and expansible rod C. To the upper end of the expansible rod Cis attached a horizontal arm K, which is adjustable thereon by means of a clamping-screw L, so that the enlarged end of the arm K can be set directly into the flame of the burner, as shown in Fig. 3. The asbestos stufling-box J prevents the transmission of heat to the supporting-rod, While the set-screw F permits the vertical adjustment of the expansible rod 0, so that the supply-openings at the lower end are accurately adjusted relatively to the supply-channels P and Q. The supportingrod E is provided at its lower end with an actuating-chain E, by which the same can be operated. A pilot-burner N is connected by a tube M and channel m, intermediately between the channels P and Q, said channel on communicating with the opening m in the lower tubular part of the expansible rod C, so as to give a small supply of gas to the pilot-flame in the higher or lower position of the expansible rod G. The pilot-flame is protected against extinction by draft or otherwise by means of a protecting-cylinder O, which is constructed in the usual manner of sheet metal having openings closed by mica.

The operation of my improved safety attachment for gas-burners is as follows: After the gas-cockb is opened the chain E is pulled,

so that the supporting-rod E is moved in IIO downward direction, together with the expansible rod G. The flame of the gas-burner is then lighted by the pilot-flame. The supporting-rod is held for a few seconds in its lower position, so that the flame can heat the arm K and expansible rod C and cause by the expansion of the latter the lateral openings in its lower part to communicate with the channels P and Q and keep up the supply of gas aslong as the flame is burning. The regulation of the flame is accomplished in the usual manner by means of the gas-cock 7), which regulates the safety-valve formed by the lower tubular end of the expansible rod C and reduces thereby the size of the channel and the supply of gas. When the flame is extinguished, either by blowing out the flame by a person unfamiliar with gas-burners or by accident or by the diminishing of the gaspressure in the main, the expansible rod C is instantly cooled and contracted and the valve at its lower end closed by the shifting of the lateral openings out of register with the supply-channels P and C. This prevents any gas escaping through the burner, so that any dan ger of injury from gas passing into the room is prevented. A small quantity of gas is passed to the pilot-burner N, as the connection with the pilot-channel m is kept up by one of the openings even while the rod C is contracted; but even if the pilot-flame should be extinguished the small quantity passing through the same will not be sufficient for producing any injurious effect, inasmuch as the gas is conducted in an upward direction by the protecting-cylinder. "hen the burner is relighted again, on lowering the supporting-rod E the pilot-flame is also ignited and the burner returned to its regular function. The expansible rod establishes by the safetyvalve at its lower end and by its expansion the supply of gas from the gas-arm to the burner or by its contraction the interruption of the same gas-supply when the flame is extinguished and controls thereby effectively and automatically the gas-outlet while the flame is burning and when the same is accidentally extinguished, so that no injury to the person occupying the room can happen owing to the reliable functioning of the safety attachment.

My improved safety attachment can also be applied to gas-burners of different construction. It can be used with or without the pilot-flame and also in connection with the wellknown VVelsbach burners, in which the expansible rod would be preferably arranged at the interior of the mantle and axially in line therewith.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with agas-burner, and a gas passage or channel leading to the same, of a thermostatically-expansible rod having an opening therein in register with said passage when expanded by the gas-flame but normally closing said passage.

2. The combination, with a gas-burner and a gas passage or channel leading thereto, of a thermostatically-expansible rod mounted adjacent said burner and having a longitudinal bore therein in communication with said gaspassage and said burner when expanded, said rod serving to close said passage when contracted.

3. The combination, with a gas-burner and a gas-passage leading thereto, of a slidablymounted expansible rod normally closing said passage,and a spring-actuated support for said rod.

t. The combination, with a gas-burner,-of an expansible rod arranged in proximity to the flame of the burner, the rod being provided at its lower end with gas-supply openings communicating by channels with the gascock and the burner, means for regulating the position of the expansible rod relatively to the gas-supply passages, and means for shifting the same so as to place said supply-openings in the lower end of the expansible rod in connection with said gas-supply passages.

5. The combination, with a gas stop-cock and gas-burner, of an intermediate guidepiece between the same, gas-channels in said guide-piece, an expansible rod provided at its lower end with valve-openings, means for adjusting said expansible rod relatively to said gas-supply channels, an enlarged arm sup ported on the expansible rod and adapted to extend into the flame, a supporting-rod for said expansible rod, and means for shifting the same together with the expansible rod for starting the lighting of the burner.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

OSKAR FRIEDRICH.

\Vitnesses:

PAUL GourEL, HENRY J. SUHRBIER. 

